people extrapolate and say miami will be flooded toronto will be flooded, los angeles will be flooded. we don't know in what time frame, 200 years, 400 years, 600 years, nobody knows what that means. the other thing is the biggest point, this is what i really think you should think about as a liberal our technological capacity to deal with the effects of global warming will increase over time. maybe we'll have walled cities. who knows where the u.s. will be in 200 years. maybe those kinds of considerations will be nothing more than a triviality. >> who knows we might get wonderful walled cities to protect us from the flood. cara. >> jack, who is coming up with these technological advances, but scientists, do you think they'll just magically fall into our laps? >> i'm extrapolating. >> we're stretching reason to come up with these technological advances because we're fighting back against massive catastrophic climate change. >> doesn't it make sense you're saying we need technology if it's happening so for example switching to wind energy, solar energy would be the kind of technology i